Ancient Worm Had Spiky Coat of Armor

[Still Waters]

Like the fictional, fearsome sandworms from the "Dune" sci-fi novels, a recently discovered worm that lived 535 million years ago had an armored body, a mouth ringed with teeth and rows of thornlike spines on its flanks.

But while the "Dune" sandworms were big enough to carry people on their backs, this ancient species, whose modern relatives are known as "mud dragons," was significantly smaller, measuring less than a tenth of an inch (2 millimeters) in length.

http://www.livescien...ssil-found.html